The central point of Irenaeus's
theology is the unity and the goodness of
God, in opposition to the Gnostics' theory of God; a number of divine emanations
(Aeons) along with a distinction between the
Monad and the
Demiurge. Irenaeus uses the
Logos theology, common in 2nd Century Christian theology. Irenaeus was a student of
Polycarp, who was said to have been tutored by
John the Apostle. Irenaeus often spoke of the Son and the Spirit as the "hands of God," though he also spoke of the Son as the "Logos."
Unity of salvation history Irenaeus's emphasis on the unity of God is reflected in his corresponding emphasis on the unity of
salvation history. Irenaeus repeatedly insists that God began the world and has been overseeing it ever since this creative act; everything that has happened is part of his plan for humanity. The essence of this plan is a process of maturation: Irenaeus believes that humanity was created immature, and God intended his creatures to take a long time to grow into or assume the divine likeness. Everything that has happened since has therefore been planned by God to help humanity overcome this initial mishap and achieve spiritual maturity. The world has been intentionally designed by God as a difficult place, where human beings are forced to make moral decisions, as only in this way can they mature as moral agents. Irenaeus likens death to the big fish that swallowed
Jonah: it was only in the depths of the whale's belly that Jonah could turn to God and act according to the divine will. Similarly, death and suffering appear as
evils, but without them we could never come to know God. According to Irenaeus, the high point in salvation history is the advent of
Jesus. For Irenaeus, the Incarnation of
Christ was intended by God before he determined that humanity would be created. Irenaeus develops this idea based on Rom. 5:14, saying "Forinasmuch as He had a pre-existence as a saving Being, it was necessary that what might be saved should also be called into existence, in order that the Being who saves should not exist in vain." Some theologians maintain that Irenaeus believed that Incarnation would have occurred even if humanity had never sinned; but the fact that they did
sin determined his role as the
savior. Irenaeus sees Christ as the new Adam, who systematically
undoes what Adam did: thus, where Adam was disobedient concerning God's edict concerning the fruit of the
Tree of Knowledge of Good and Evil, Christ was obedient even to death on the wood of a tree. Irenaeus is the first to draw comparisons between
Eve and
Mary, contrasting the faithlessness of the former with the faithfulness of the latter. In addition to reversing the wrongs done by Adam, Irenaeus thinks of Christ as "recapitulating" or "summing up" human life. Irenaeus conceives of our salvation as essentially coming about through the
incarnation of God as a man. He characterizes the penalty for sin as death and
corruption. God, however, is
immortal and incorruptible, and simply by becoming united to human nature in Christ he conveys those qualities to us: they spread, as it were, like a benign infection. Irenaeus emphasizes that salvation occurs through Christ's Incarnation, which bestows incorruptibility on humanity, rather than emphasizing His Redemptive death in the
crucifixion, although the latter event is an integral part of the former.
Christ's life Part of the process of recapitulation is for Christ to go through every stage of human life, from infancy to old age, and simply by living it, sanctify it with his divinity. Irenaeus believed Christ did not die until he was older than is conventionally portrayed. In the passage of
Adversus Haereses under consideration, Irenaeus claims that after receiving baptism at the age of thirty, citing Luke 3:23, Gnostics then falsely assert that "He [Jesus] preached only one year reckoning from His baptism," and also, "On completing His thirtieth year He [Jesus] suffered, being in fact still a young man, and who had by no means attained to advanced age." Irenaeus argues against the Gnostics by using scripture to add several years after his baptism by referencing 3 distinctly separate visits to Jerusalem. The first is when Jesus makes wine out of water, he goes up to the Paschal feast-day, after which he withdraws and is found in Samaria. The second is when Jesus goes up to Jerusalem for Passover and cures the paralytic, after which he withdraws over the sea of Tiberias. The third mention is when he travels to Jerusalem, eats the Passover, and suffers on the following day. Irenaeus quotes scripture (John 8:57), to suggest that Jesus ministers while in his 40s. In this passage, Jesus's opponents want to argue that Jesus has not seen Abraham, because Jesus is too young. Jesus's opponents argue that Jesus was not yet 50 years old. Irenaeus argues that if Jesus were in his thirties, his opponents would have argued that he was not yet 40 years old, since that would make him even younger. Irenaeus's argument is that they would not weaken their own argument by adding years to Jesus's age. Irenaeus also writes: "The Elders witness to this, who in Asia conferred with John the Lord's disciple, to the effect that John had delivered these things unto them: for he abode with them until the times of Trajan. And some of them saw not only John, but others also of the Apostles, and had this same account from them, and witness to the aforesaid relation." In Demonstration (74) Irenaeus notes "For
Pontius Pilate was governor of
Judæa, and he had at that time resentful enmity against
Herod the king of the Jews. But then, when Christ was brought to him bound, Pilate sent Him to Herod, giving command to enquire of him, that he might know of a certainty what he should desire concerning Him; making Christ a convenient occasion of reconciliation with the king." Pilate was the
prefect of the Roman province of
Judaea from AD 26–36. Reconciliation is also a theme of Paul's that Irenaeus stresses in his teachings on Salvation. Irenaeus believes Jesus coming in flesh and blood sanctified humanity so that it might again reflect the perfection associated with the likeness of the Divine. This perfection leads to a new life, in the lineage of God, which is forever striving for eternal life and unity with the Father. This is a carryover from Paul, who attributes this reconciliation to the actions of Christ: "For since death came through a human being, the resurrection of the dead has also come through a human being; for as all die in Adam, so all will be made alive in Christ". A third theme in both Paul's and Irenaeus's conceptions of salvation is the sacrifice of Christ being necessary for the new life given to humanity in the triumph over evil. It is in this obedient sacrifice that Jesus is victor and reconciler, thus erasing the marks that Adam left on human nature. To argue against the Gnostics on this point, Irenaeus uses Colossians in showing that the debt which came by a tree has been paid for us in another tree. Furthermore, the first chapter of
Ephesians is picked up in Irenaeus's discussion of the topic when he asserts, "By His own blood He redeemed us, as also His apostle declares, 'In whom we have redemption through His blood, even the remission of sins.'" The frequencies of quotations and allusions to the Pauline Epistles in
Against Heresies are:
Christ as the New Adam To counter his Gnostic opponents, Irenaeus significantly develops Paul's presentation of Christ as the
Last Adam. Irenaeus's presentation of Christ as the New Adam is based on Paul's Christ-Adam parallel in , but also derives significantly from the Johannine presentation of the Adam-Christ typology. Irenaeus uses this parallel to demonstrate that Christ truly took human flesh. Irenaeus considered it important to emphasize this point because he understands the failure to recognize Christ's full humanity links the various strains of Gnosticism together, as seen in his statement that "according to the opinion of no one of the heretics was the Word of God made flesh." Irenaeus believes that unless the Word became flesh, humans were not fully redeemed. He explains that by becoming man, Christ restored humanity to being in the image and likeness of God, which they had lost in the
Fall of man. Just as Adam was the original head of humanity through whom all sinned, Christ is the new head of humanity who fulfills Adam's role in the
Economy of Salvation. Irenaeus calls this process of restoring humanity recapitulation. For Irenaeus, Paul's presentation of the Old Law (the
Mosaic covenant) in this passage indicates that the Old Law revealed humanity's sinfulness but could not save them. He explains that "For as the law was spiritual, it merely made sin to stand out in relief, but did not destroy it. For sin had no dominion over the spirit, but over man." Since humans have a physical nature, they cannot be saved by a spiritual law. Instead, they need a human Savior. This is why it was necessary for Christ to take human flesh. Irenaeus summarizes how Christ's taking human flesh saves humanity with a statement that closely resembles , "For as by the disobedience of the one man who was originally moulded from virgin soil, the many were made sinners, and forfeited life; so was it necessary that, by the obedience of one man, who was originally born from a virgin, many should be justified and receive salvation." The physical creation of Adam and Christ is emphasized by Irenaeus to demonstrate how the Incarnation saves humanity's physical nature. Irenaeus emphasizes the importance of Christ's reversal of Adam's action. Through His obedience, Christ undoes Adam's disobedience. Irenaeus presents the Passion as the climax of Christ's obedience, emphasizing how this obedience on the tree of the Cross undoes the disobedience that occurred through a tree. Irenaeus's interpretation of Paul's discussion of Christ as the New Adam is significant because it helped develop the
recapitulation theory of atonement. Irenaeus emphasizes that it is through Christ's reversal of Adam's action that humanity is saved, rather than considering the Redemption to occur in a cultic or juridical way. The biblical passage, "Death has been swallowed up in victory", implied for Irenaeus that the Lord will surely resurrect the first human, i.e. Adam, as one of the saved. According to Irenaeus, those who deny Adam's salvation are “shutting themselves out from life for ever” and the first one who did so was
Tatian. The notion that the
Second Adam saved the first Adam was advocated not only by Irenaeus, but also by
Gregory Thaumaturgus, which suggests that it was popular in
the Early Church.
Valentinian Gnosticism Valentinian Gnosticism was one of the major forms of Gnosticism that Irenaeus opposed. According to the Gnostic view of Salvation, creation was perfect to begin with; it did not need time to grow and mature. For the Valentinians, the material world is the result of the loss of perfection which resulted from
Sophia's desire to understand the Forefather. Therefore, one is ultimately redeemed, through secret knowledge, to enter the
pleroma of which the Achamoth originally fell. According to the Valentinian Gnostics, there are three classes of human beings. They are the material, who cannot attain salvation; the psychic, who are strengthened by works and faith (they are part of the church); and the spiritual, who cannot decay or be harmed by material actions. Essentially, ordinary humans—those who have faith but do not possess the special knowledge—will not attain salvation. Spirituals, on the other hand—those who obtain this great gift—are the only class that will eventually attain salvation. In his article entitled "The Demiurge",
J.P. Arendzen sums up the Valentinian view of the salvation of man. He writes, "The first, or carnal men, will return to the grossness of matter and finally be consumed by fire; the second, or psychic men, together with the Demiurge as their master, will enter a middle state, neither heaven (pleroma) nor hell (hyle); the purely spiritual men will be completely freed from the influence of the Demiurge and together with the Saviour and Achamoth, his spouse, will enter the pleroma divested of body (hyle) and soul (psyche)." In this understanding of salvation, the purpose of the Incarnation was to redeem the Spirituals from their material bodies. By taking a material body, the Son becomes the Savior and facilitates this entrance into the pleroma by making it possible for the Spirituals to receive his spiritual body. However, in becoming a body and soul, the Son Himself becomes one of those needing redemption. Therefore, the Word descends onto the Savior at His Baptism in the Jordan, which liberates the Son from his corruptible body and soul. His redemption from the body and soul is then applied to the Spirituals. In response to this Gnostic view of Christ, Irenaeus emphasized that the Word became flesh and developed a soteriology that emphasized the significance of Christ's material Body in saving humanity, as discussed in the sections above. In his criticism of Gnosticism, Irenaeus made reference to a Gnostic gospel which portrayed
Judas in a positive light, as having acted in accordance with Jesus's instructions. The recently discovered
Gospel of Judas dates close to the period when Irenaeus lived (late 2nd century), and scholars typically regard this work as one of many Gnostic texts, showing one of many varieties of Gnostic beliefs of the period. ==Quartodeciman Controversy==